Robbery is considered an aggravated form of both theft and extortion. To understand why, let's break down each term:
- Theft: This involves taking someone's property without their consent, intending to permanently deprive the owner of it.
- Extortion: This involves obtaining something, especially money, through force or threats.
- Robbery: This is essentially theft accompanied by the use of force or intimidation. It is theft combined with the threat or act of violence, aligning it as an aggravated form of both theft and extortion.
Therefore, the correct answer is that robbery is an aggravated form of both (a) theft and (b) extortion.